Staffordshire Building Society chief executive Keith Page has left the society by mutual consent after six years.
The society says an agreement was reached last week between Page and the board that he should step down both as chief executive and as a director.
Staffordshire says Page has left the society to spend more time with his family following recent health problems caused by stress.
His illness forced him to take time off from Staffordshire last year and he is not thought to be looking for alternative employment.
Page became the youngest-ever chief executive of a society when he was appointed aged 40 in 1995.
Deputy chief executive Bill Snaith will take over as chief executive until the position is filled on a permanent basis.
He says: “Keith Page is leaving the society for stress-induced health reasons but goes on the best of terms.
“The society thanks Keith for all his efforts and significant contributions over th
e last 19 years and wishes him every success for the future”